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Completed the project 3 or 4 weeks ago, only needed 2 in my backyard. Front yard will be done next summer as concrete was being completed around the house so I couldn't do the front. Appreciate everyone's help here! Sent from my iPhone using Garage Journal

Doing the project this weekend. Found this flow chart table for the sprinklers I will use. Is the GPM listed in the image assuming it's spraying a full 360 degrees. If I'm only spraying it 90 degrees, do I need to divide that number by 4? Thanks, Sent from my iPhone using Garage Journal

I believe I only need 2 per zone. Will draw it out this week! Sent from my iPhone using Garage Journal

Ahh I see, thanks for clarifying because when I went to home depot, I didn't see anything about different nozzle sizes. I'm in Toronto. Gets to about -30 at absolute worst but that's rare. Sent from my iPhone using Garage Journal

Thanks! This helps. Do you know what the first number in the column directly to the right of the pressure reading is? And why are some of the rows in the tables greyed out? Sent from my iPhone using Garage Journal

I plan on using the orbit line so that I don't have to drain it out every year. I had a talk with a neighbor who used it and he says he has had it for several seasons with no freezing issues. Sent from my iPhone using Garage Journal

So I measured the flow using the attached method at 30-35 psi. I got 8.57 us gallon per minute or 6.25 imperial gallon per minute. Time to guy sprinklers. Does anyone know an effective way to drain the water using a gravity drain versus using an air compressor? If I put a ball valve at the...

Not that big of a job, only about 2 or 3 needed in the backyard, one along the side of the house and 2 in the front. Sent from my iPhone using Garage Journal

Just to clarify and be sure, if my water pressure is 80 psi but the sprinkler needs 30 psi to operate, won't that turn all the water into mist and waste it? Sorry if this is a repeat question. Sent from my iPhone using Garage Journal

I want to get a quote from a contractor prior to starting as sometimes the prices are so low (potlights for example) that it may not make sense to do all the work for such little saving. Sent from my iPhone using Garage Journal

Last question, is the flow rate on the sprinkler in US GPM or imperial GPM? Sent from my iPhone using Garage Journal

Thanks a lot! This helps Sent from my iPhone using Garage Journal

So if I understand correctly, I start at 90 psi, and calculate all the pressure losses through the system to the sprinkler heads based on the pressure loss tables. If my calculated pressure at the heads is still too high, then I would need a regulator, otherwise I can just plumb it as is without...

Measured the water pressure today, it's 90 psi of static pressure. I would have to use a pressure regulator to drop the pressure down to whatever the sprinkler heads need, and then remeasure the flow rate at the pressure to get an accurate measurement of how many sprinklers I can have on each...

Still deciding whether or not to do it this way, or just have a quick disconnect hose at the spigot that will power the different zones and turn it on/off manually. Sent from my iPhone using Garage Journal

Perfect! Thank you. [emoji4] Now I just need to test my flow at the pressure the heads will need to operate. Sent from my iPhone using Garage Journal

Thanks! I will use this method. Sent from my iPhone using Garage Journal

As I was reading about pressure, flow and water velocity, had one question. If reducing pipe size at a given static pressure does nothing but increase pressure loss due to friction and i crease water velocity to a potentially unsafe level, why use a smaller pipe at all? Sounds counter intuitive...

I will likely put a T on the spigot itself, install the pressure regulator and anti siphon valve rather than run a separate pipe as that would involve calling a plumber. Only my spigot is sticking out in my backyard, everything else is in my basement which is being constructed at the moment and...

Can heads operate at slightly lower psi than listed? As pressure drops after it goes through the first sprinkler in a line, will the second sprinkler have enough? Sent from my iPhone using Garage Journal